c++利用二重循环和setw

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
    int n,i,j;
    cin >> n;
    for (i = 1; i <= n; i++)
    {
        cout << setw(n-i) << "";
        for (j = 1; j <= 2*i-1; j++)
            cout << i;
        cout << endl;
    }
     return 0;
}

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